Lenovo ThinkSystem PM893 User guide

Brand: Lenovo

Model: ThinkSystem PM893

Category: Internal hard drives

Type: User guide

Lenovo ThinkSystem PM893 Read Intensive SATA 6Gb SSDs are engineered for greater performance and endurance in a cost-effective design, supporting a broad set of workloads. Ideal for read-intensive applications such as web serving, hyperscale cloud, content delivery, caching, databases, and analytics, these SSDs provide outstanding IOPS/watt and cost/IOPS for enterprise solutions.

ThinkSystem PM893 Read Intensive SATA 6Gb SSDs

Product Guide

The ThinkSystem PM893 Read Intensive SATA SSDs are general-purpose SSDs based on the Samsung

PM893 platform and are available in capacities ranging from 480GB to 7.86TB. They are engineered for

greater performance and endurance in a cost-effective design, and to support a broader set of workloads.

Figure 1. Lenovo ThinkSystem 2.5" PM893 Read Intensive SATA 6Gb Hot Swap SSD

Did you know?

Lenovo Read Intensive SSDs are suitable for read-intensive and general-purpose data center workloads.

Overall, these SSDs provide outstanding IOPS/watt and cost/IOPS for enterprise solutions and are an

excellent choice for applications such as web serving, hyperscale cloud, content delivery, caching,

databases, and analytics.

ThinkSystem PM893 Read Intensive SATA 6Gb SSDs 1

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Part number information

The following table lists the part numbers and feature codes.

Table 1. Ordering part numbers and feature codes

Part number Feature code Description

2.5-inch hot-swap drives for ThinkSystem

4XB7A72438 BM8B ThinkSystem 2.5" PM893 480GB Read Intensive SATA 6Gb HS SSD

4XB7A72439 BM8A ThinkSystem 2.5" PM893 960GB Read Intensive SATA 6Gb HS SSD

4XB7A72440 BM89 ThinkSystem 2.5" PM893 1.92TB Read Intensive SATA 6Gb HS SSD

4XB7A72441 BM88 ThinkSystem 2.5" PM893 3.84TB Read Intensive SATA 6Gb HS SSD

4XB7A72442 BM87 ThinkSystem 2.5" PM893 7.68TB Read Intensive SATA 6Gb HS SSD

The part numbers include the following items:

One 2.5-inch solid-state drive in a ThinkSystem hot-swap tray

Documentation flyer

Features

The PM893 SSDs have the following features:

Low cost, read-intensive SSD from Samsung

2.5-inch industry standard form factor with hot-swap tray

6 Gbps SATA interface

Advanced ECC Engine and End-to-End Data Protection

Samsung V6 (128-layer) TLC V-NAND stacks the vertical NAND layers in three dimensions, solving

the cell-to-cell interference that causes data corruption in planar NAND.

Protect data integrity from unexpected power loss with Samsung's advanced power-loss protection

(PLP) architecture

Supports Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T).

Dynamic Thermal Guard Protection protects the SSD from overheating by automatically controlling

the speed of the CPU relative to its core temperature

Read-Intensive (Entry) SSDs and Write-Intensive (Performance) SSDs have similar read and write IOPS

performance, but the key difference between them is their endurance (or lifetime) (that is, how long they

can perform write operations because SSDs have a finite number of program/erase (P/E) cycles). Read-

Intensive SSDs have a better cost/IOPS ratio but lower endurance compared to Write-Intensive SSDs. SSD

write endurance is typically measured by the number of program/erase (P/E) cycles that the drive incurs

over its lifetime, listed as the total bytes of written data (TBW) in the device specification.

The TBW value assigned to a solid-state device is the total bytes of written data (based on the number of

P/E cycles) that a drive can be guaranteed to complete (% of remaining P/E cycles = % of remaining TBW).

Reaching this limit does not cause the drive to immediately fail. It simply denotes the maximum number of

writes that can be guaranteed. A solid-state device will not fail upon reaching the specified TBW. At some

point based on manufacturing variance margin, after surpassing the TBW value, the drive will reach the

end-of-life point, at which the drive will go into a read-only mode.

Because of such behavior by Read-Intensive solid-state drives, careful planning must be done to use them

only in read-intensive or mix-use up to 70% read/30% write environments to ensure that the TBW of the

drive will not be exceeded before the required life expectancy.

ThinkSystem PM893 Read Intensive SATA 6Gb SSDs 2

For example, the 3.84TB PM893 drive has an endurance of 7,008 TB of total bytes written (TBW). This

means that for full operation over five years, write workload must be limited to no more than 3,840 GB of

writes per day, which is equivalent to 1.0 full drive writes per day (DWPD). For the device to last three

years, the drive write workload must be limited to no more than 6,400 GB of writes per day, which is

equivalent to 1.7 full drive writes per day.

Technical specifications

The following table lists the technical specifications of the PM893 SSDs.

Table 2. Technical specifications

Feature 480 GB drive 960 GB drive 1.92 TB drive 3.84 TB drive 7.68 TB drive

Interface 6 Gbps SATA 6 Gbps SATA 6 Gbps SATA 6 Gbps SATA 6 Gbps SATA

Capacity 480 GB 960 GB 1.92 TB 3.84 TB 7.68 TB

SED encyption None None None None None

Endurance (total bytes

written)

876 TB 1752 TB 3504 TB 7008 TB 14,016 TB

Endurance (drive writes per

day for 5 years)

1 DWPD 1 DWPD 1 DWPD 1 DWPD 1 DWPD

Data reliability (UBER) < 1 in 10 bits

read

< 1 in 10 bits

read

< 1 in 10 bits

read

< 1 in 10 bits

read

< 1 in 10 bits

read

MTBF 2,000,000

hours

2,000,000

hours

2,000,000

hours

2,000,000

hours

2,000,000

hours

IOPS reads (4 KB blocks) 98,000 98,000 98,000 98,000 98,000

IOPS writes (4 KB blocks) 29,000 31,000 31,000 31,000 31,000

Sequential read rate (128

KB blocks)

560 MBps 560 MBps 560 MBps 560 MBps 560 MBps

Sequential write rate (128

KB blocks)

530 MBps 530 MBps 530 MBps 530 MBps 530 MBps

Read latency (random) 120 µs 120 µs 120 µs 120 µs 120 µs

Write latency (random) 40 µs 40 µs 40 µs 40 µs 40 µs

Shock, non-operating 1,500 G (Max)

at 0.5 ms

1,500 G (Max)

at 0.5 ms

1,500 G (Max)

at 0.5 ms

1,500 G (Max)

at 0.5 ms

1,500 G (Max)

at 0.5 ms

Vibration, non-operating 20 G (20-2000

Hz)

20 G (20-2000

Hz)

20 G (20-2000

Hz)

20 G (20-2000

Hz)

20 G (20-2000

Hz)

Typical power (R/W) 2.1 W / 3.2 W 2.2 W / 3.2 W 2.2 W / 3.2 W 2.2 W / 3.2 W 2.2 W / 3.2 W

17 17 17 17 17

ThinkSystem PM893 Read Intensive SATA 6Gb SSDs 3

Server support

The following tables list the ThinkSystem servers that are compatible.

Table 3. Server support (Part 1 of 2)

Part

Number Description

Edge

1S Intel

2S Intel

V2 AMD Dense V2

V2 8S

4XB7A72438 ThinkSystem 2.5" PM893

480GB Read Intensive SATA

6Gb HS SSD

N N N N N Y Y Y Y Y Y Y Y N N N Y Y Y Y

4XB7A72439 ThinkSystem 2.5" PM893

960GB Read Intensive SATA

6Gb HS SSD

N N N N N Y Y Y Y Y Y Y Y N N N Y Y Y Y

4XB7A72440 ThinkSystem 2.5" PM893

1.92TB Read Intensive SATA

6Gb HS SSD

N N N N N Y Y Y Y Y Y Y Y N N N Y Y Y Y

4XB7A72441 ThinkSystem 2.5" PM893

3.84TB Read Intensive SATA

6Gb HS SSD

N N N N N Y Y Y Y Y Y Y Y N N N Y Y Y Y

4XB7A72442 ThinkSystem 2.5" PM893

7.68TB Read Intensive SATA

6Gb HS SSD

N N N N N Y Y Y Y Y Y Y Y N N N Y Y Y Y

SE350 (7Z46 / 7D1X)

SE450 (7D8T)

ST50 V2 (7D8K / 7D8J)

ST250 V2 (7D8G / 7D8F)

SR250 V2 (7D7R / 7D7Q)

ST650 V2 (7Z75 / 7Z74)

SR630 V2 (7Z70 / 7Z71)

SR650 V2 (7Z72 / 7Z73)

SR670 V2 (7Z22 / 7Z23)

SR635 (7Y98 / 7Y99)

SR655 (7Y00 / 7Z01)

SR645 (7D2Y / 7D2X)

SR665 (7D2W / 7D2V)

SD630 V2 (7D1K)

SD650 V2 (7D1M)

SD650-N V2 (7D1N)

SN550 V2 (7Z69)

SR850 V2 (7D31 / 7D32)

SR860 V2 (7Z59 / 7Z60)

SR950 (7X11 / 7X12)

ThinkSystem PM893 Read Intensive SATA 6Gb SSDs 4

Table 4. Server support (Part 2 of 2)

Part

Number Description

1S Intel V1 2S Intel V1 Dense V1 4S V1

4XB7A72438 ThinkSystem 2.5" PM893 480GB